CN103885657A - Method of compensating reference data and touch screen apparatus using the method - Google Patents

Method of compensating reference data and touch screen apparatus using the method Download PDF

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Publication number
CN103885657A
CN103885657A CN201310680502.9A CN201310680502A CN103885657A CN 103885657 A CN103885657 A CN 103885657A CN 201310680502 A CN201310680502 A CN 201310680502A CN 103885657 A CN103885657 A CN 103885657A
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China
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touch
data
raw data
frame period
coordinate
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CN201310680502.9A
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CN103885657B (en
Inventor
申善京
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LG Display Co Ltd
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LG Display Co Ltd
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Priority to KR1020120151149A priority Critical patent/KR102007817B1/en
Priority to KR10-2012-0151149 priority
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Publication of CN103885657A publication Critical patent/CN103885657A/en
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Publication of CN103885657B publication Critical patent/CN103885657B/en
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    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416Control or interface arrangements specially adapted for digitisers
    • G06F3/0418Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
    • G06F3/04182Filtering of noise external to the device and not generated by digitiser components
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416Control or interface arrangements specially adapted for digitisers
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416Control or interface arrangements specially adapted for digitisers
    • G06F3/0418Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
    • G06F3/04184Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0446Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes

Abstract

The invention provides a method of compensating reference data and a touch screen apparatus using the method. The method of compensating reference data includes calculating touch compensation data in the n-th frame period by compensating touch raw data in the n-th frame period using the reference data in the (n-1)-th frame period that is stored in a memory, detecting touch candidate coordinates by analyzing the touch compensation data in the n-th frame period, generating reference compensation data in the n-th frame period by setting up a labeling block from the touch raw data corresponding to the touch candidate coordinates and by compensating the touch raw data included in the labeling block, not the touch raw data not included, and generating reference data in the n-th frame period by calculating an average value of the reference compensation data in the n-th frame period, and the reference compensation data in the (n-k)-th to (n-1)-th frame periods, stored in the memory.

Description

The touch panel device of the method for standard of compensation data and use the method
Technical field
The disclosure relates to the method for standard of compensation data and uses the touch panel device of the method.
Background technology
In recent years, dull and stereotyped electronic display technology is developed, makes dull and stereotyped electronic display technology become the numerical information product of the support information society much newly emerging in large numbers and the requirement of application.The example of dull and stereotyped electronic display technology is liquid crystal display (LCD), plasma display panel (PDP), Organic Light Emitting Diode (OLED) etc.In these technology, show that by OLED technology the flat-panel devices of image has following characteristics: with low voltage operating, slim body, viewing angle is wide and the response time is fast.
User interface (UI) allows communication simultaneously between user and multiple Electrical and Electronic equipment, and provides the simple and random control to equipment to user.The typical case of user interface is keypad (keypad), keyboard, mouse, screen display (OSD) and has been equipped with infrared communication function or the telepilot of radio frequency (RF) communication function.User interface techniques make user interface to people more friendly and increase user interface operation convenience aspect make progress.In recent years, user interface has evolved to and has touched UI, speech recognition UI, 3D UI etc.
In portable communication device, adopt indispensably touch UI to become a kind of trend.Touch UI and be also applied to household electrical appliance.As realizing an example of touch panel device that touches UI, can sensing approach and touch and mutual capacitance type touch panel device that identification touches (or approaching) has obtained universal more more.
Mutual capacitance type touch panel device comprises Tx line and the Rx line that intersects with Tx line and be formed on the touch sensor on the cross section that Tx line and Tx line intersect.Each touch sensor has mutual capacitance.Touch panel device detects and is touching (or approach) before and the variable quantity of the voltage of touch sensor afterwards, and thereby whether definite conductive material contacts with touch-screen and conductive material with respect to the position of touch-screen.Touch panel device provides driving pulse to the Tx line in touch-screen (touch screen panel), convert the variable quantity of the electric charge on touch sensor to touch raw data as numerical data, analyze this touch raw data, and calculate thus touch coordinate.
On the other hand, in correlation technique, known compensation touches the method for raw data, wherein before analyzing touch raw data, uses reference data compensation touch raw data and calculate thus touch coordinate.Touch in the method for raw data in the compensation of correlation technique, determine the time that user's touch does not occur, upgrade in this case reference data., touch in the method for raw data in the compensation of correlation technique for this reason, occurred in reference data, not reflecting in the time that the short time changes suddenly when noise the problem of this noise.In the case, touch in the method for raw data in the compensation of correlation technique, occur making to touch owing to compensating touch raw data by the base value that does not reflect noise the further problem that raw data is compensated by mistake.
Summary of the invention
According to aspect of the present disclosure, a kind of method of standard of compensation data is provided, the method comprises the following steps: be stored in (n-1) in the storer described reference data in the frame period by utilization and compensate the touch raw data in the n frame period, calculate the touch offset data in the n frame period; Detect touch candidate coordinate by the touch offset data of analyzing in the n frame period; By setting tag block and be included in the touch raw data in tag block and uncompensation is not included in the touch raw data in tag block, the benchmark offset data in the generation n frame period by compensation in the described touch raw data corresponding with described touch candidate coordinate; And by calculating benchmark offset data in the n frame period and being stored in the in described storer (n-k)the mean value of the benchmark offset data of frame period to the (n-1) in the frame period, produces the reference data in the n frame period.
According to aspect of the present disclosure, a kind of touch panel device is provided, this touch panel device comprises: touch screen, this touch screen comprises Tx line, Rx line and is formed on the touch sensor on the cross section that described Tx line and described Rx line intersect; Touch driving circuit, this touch driving circuit provides driving pulse to described Tx line, is numerical data by the voltage transitions receiving by described Rx line, and thereby output touch raw data; And touch algorithm performance element, described touch raw data is input to this touch algorithm performance element from described touch driving circuit, wherein, described touch algorithm performance element comprises: touch raw data compensating unit, (n-1) reference data in the frame period that this touch raw data compensating unit is stored in storer by use compensates the touch raw data in the n frame period, calculates the touch offset data in the n frame period; Touch candidate's coordinate measurement unit, touch offset data in this touch candidate coordinate measurement element analysis n frame period, and detection touches candidate's coordinate thus, benchmark offset data generation unit, this benchmark offset data generation unit by setting tag block and being included in the touch raw data in tag block and uncompensation is not included in the touch raw data in tag block, the benchmark offset data in the generation n frame period by compensation in the described touch raw data corresponding with described touch candidate coordinate; And reference data generation unit, this reference data generation unit, by calculating benchmark offset data in the n frame period and being stored in the mean value of (n-k) frame period to the (n-1) in described storer benchmark offset data in the frame period, produces the reference data in the n frame period.
The feature and advantage of describing in summary of the invention and following embodiment are not intended to restriction.Based on accompanying drawing, instructions and claim, to those skilled in the art, a lot of supplementary features and advantage will become obvious.
Accompanying drawing explanation
Fig. 1 is the block diagram schematically illustrating according to the display device of embodiment and touch panel device.
Fig. 2 illustrates in detail according to the block diagram of the touch algorithm performance element of embodiment.
Fig. 3 illustrates according to the process flow diagram of the method for the standard of compensation data of embodiment.
Fig. 4 illustrates according to the exemplary plot of the touch raw data of the method for the illustrative standard of compensation data of Fig. 3, benchmark offset data, reference data and touch offset data.
Fig. 5 A and Fig. 5 B illustrate the exemplary plot that touches raw data and benchmark offset data.
Fig. 6 is the exemplary plot that illustrates tag block.
Fig. 7 A and Fig. 7 B are that the compensation that illustrates respectively use correlation technique touches the touch offset data of method calculating of raw data and the exemplary plot of the touch offset data that the method for use compensation touch raw data is according to the embodiment of the present invention calculated.
Embodiment
Describe more all sidedly below with reference to accompanying drawings the present invention, in accompanying drawing, obtained illustrative embodiments of the present invention.But the present invention can be with many multi-form enforcements, and should not to be interpreted as be the restriction of the embodiment to setting forth here.Element like similar Reference numeral representation class in whole instructions.In the following description, if determine that the known function relevant with the present invention or the detailed description of structure make theme of the present invention unclear, omit and describe in detail.
Fig. 1 is the block diagram schematically illustrating according to the display device of embodiment and touch panel device.With reference to Fig. 1, display device comprises display board (DIS), gating drive circuit 10, data drive circuit 20, timing controller 30, host computer system 70 etc.Touch panel device comprises touch-screen (TSP), driving circuit 40, touch algorithm performance element 50 etc.
First, describe in detail according to the display device of embodiment.Be implemented as liquid crystal display (LCD), active display (FED), plasma display panel (PDP), Organic Light Emitting Diode (OLED), electrophoretic display device (EPD) (EPD) etc. according to the display device of embodiment.Mainly be described as being embodied as below liquid-crystal apparatus according to the display device of embodiment, but it should be noted that this does not form any restriction to display device.
Display board (DIS) comprises infrabasal plate and upper substrate, and liquid crystal layer is formed between upper substrate and infrabasal plate.On the infrabasal plate of display board (DIS), being formed with many data line D1 is natural number to Dm(m) and with many select lines G1 that many data line D1 intersect to Dm be natural number to Gn(n).In addition, the cross part office intersecting to Gn to Dm and many select lines G1 at many data line D1 is formed with multiple thin film transistor (TFT)s.In addition, on the infrabasal plate of display board (DIS), be formed with multiple pixel electrodes and holding capacitor.Multiple pixel electrodes are for applying data voltage to liquid crystal cells.Holding capacitor is connected to multiple pixel electrodes to maintain the voltage of liquid crystal cells.
On the upper substrate of display board (DIS), be formed with black matrix, color filter etc.But, if being implemented as, display board (DIS) there is upper color filter (OCT) structure of TFT, black matrix and color filter can be formed on the infrabasal plate of display board (DIS).Display board (DIS) can be realized according to any known liquid crystal mode, switches (FFS) pattern such as twisted-nematic (TN) pattern, perpendicular alignmnet (VA) pattern, in-plain switching (IPS) pattern and fringing field.
Polarizer is attached to the each party in upper substrate and the infrabasal plate of display board (DIS), and forms both alignment layers, and this both alignment layers is fixed on the tilt angle of the liquid crystal molecule on the inside surface of both alignment layers mode according to setting forms.Between the upper substrate of display board (DIS) and infrabasal plate, be formed for the column spacer of the cell gap that maintains liquid crystal cells.Back light unit is disposed in the rear of display board (DIS).Back light unit is implemented as peripheral type or Staight downward type backlight unit and to display board (DIS) utilizing emitted light.
Data drive circuit 20 receives Digital Image Data RGB and source timing controling signal (DCS) from timing controller 30.Data drive circuit 20 is converted to the positive/negative polarity data voltage of simulation according to source timing controling signal (DCS) by Digital Image Data RGB, and transformation result is provided to data line.Gating drive circuit 10 sequentially provides the strobe pulse (or scanning impulse) of synchronizeing with data voltage to select lines G1 to Gn, and selects the pixel that will apply data voltage in display board (DIS).
Digital Image Data RGB and timing signal are input to timing controller 30 from host computer system 70.Timing signal comprises vertical synchronizing signal, horizontal-drive signal, data enable signal, Dot Clock etc.Vertical synchronizing signal is the signal that limits a frame period.Horizontal-drive signal is to limit the signal that the needed horizontal cycle of data voltage is provided to the pixel in a horizontal line in display board (DIS).Data enable signal is the signal that limits the period of input valid data.Dot Clock is the signal repeating with short cycling time.
In order to control the operation timing of gating drive circuit 10 and the operation timing of data drive circuit 20, based on timing signal, timing controller 30 produces the gating timing signal (GCS) of the operation timing for controlling gating drive circuit 10 and for controlling the source timing controling signal (DCS) of operation timing of data drive circuit 20.Gating timing controling signal (GCS) is outputed to gating drive circuit 10 by timing controller 30, and source timing controling signal (DCS) is outputed to data drive circuit 20.
Host computer system 70 is implemented as any in navigational system, Set Top Box, DVD player, Blu-ray Disc player, personal computer (PC), household audio and video system, broadcasting receiver, telephone system.Host computer system 70 comprises the system on chip (SoC) with built-in scaler (scaler), and the Digital Image Data RGB on the image of input is converted to and is applicable to the form that shows on display board (DIS).Host computer system 70 sends Digital Image Data RGB and timing signal to timing controller 30.In addition, host computer system 70 is analyzed the application program of touch coordinate data HiDxy the execution of inputting from touch algorithm performance element 50 and the coordinates correlation connection that user's touch occurs.
The second, describe in detail according to the touch panel device of embodiment.Touch pad (TSP) comprising: Tx line T1 is to be equal to or greater than 2 natural number to Tj(j), the Rx line R1 that intersects to Tj with Tx line T1 is to be equal to or greater than 2 natural number to Ri(i) and be formed on (i × j) the individual touch sensor of the cross part office that Tx line T1 intersects to Ri to Tj and Rx line R1.Each touch sensor is implemented as the mutual capacitance having with regard to equivalent electrical circuit, but it is noted that each touch sensor is not limited to this.
If touch panel device and display device combine, touch-screen (TSP) is attached to the top of display board (DIS).Particularly, if display device is implemented as liquid crystal display, touch-screen (TSP) is attached to the upper polarizer of display board (DIS), or is attached between the upper polarizer and upper substrate of display board (DIS).In addition, the touch sensor of touch-screen TSP (embed (in-cell) type) is formed on the infrabasal plate in the display board of liquid crystal display together with pel array.
Driving circuit 40 provides driving pulse so that they are synchronous to Tx line T1 to Tj, and passes through Rx line R1 to Ri sensing touch sensor voltage.Driving circuit 40 comprises Tx driving circuit 41, Rx driving circuit 42 and touch controller 43.Tx driving circuit 41, Rx driving circuit 42 and touch controller 43 are integrated in one and read IC(ROIC) in.
Tx driving circuit 41 selects to export the Tx passage of driving pulse under the control of touch controller 43, and provides driving pulse to the Tx line that is connected to selected Tx passage.Rx driving circuit 42 is selected the Rx passage of the variable quantity that will receive the electric charge on touch sensor under the control of touch controller 43, and receives the variable quantity of the electric charge on touch sensor by being connected to the Rx line of selected Rx passage.Rx driving circuit 42 is sampled to the variable quantity of the electric charge on the touch sensor receiving to Ri by Rx line R1, and in integrator accumulated samples result.Rx driving circuit 42 is input to analog to digital converter (ADC) by the voltage of accumulating on integrator and is to touch raw data TRD by inputted voltage transitions, exports thus transformation result.
Touch controller 43 produces the Tx that is used for setting Tx passage (Tx driving circuit 41 is by this Tx passage output driving pulse) and sets up signal and set up signal for the Rx that sets Rx passage (Rx driving circuit 42 is by this Rx passage reception touch sensor voltage).In addition, the timing controling signal that touch controller 43 produces for controlling the operation timing of Tx driving circuit 41 and the operation timing of Rx driving circuit 42.
Touch algorithm performance element 50 is provided touch raw data TRD from touching driving circuit 40.By using reference data RD, 50 compensation of touch algorithm performance element touch raw data TRD and calculate and touch offset data TCD.Touch algorithm performance element 50 sequentially uses integral compensation algorithm, labeling algorithm etc. to calculate touch coordinate to touching offset data TCD.Integral compensation algorithm refer to by have on the occasion of touch offset data TCD and have the touch offset data TCD of negative value unified for have on the occasion of the algorithm of touch offset data TCD, change negative sign into positive sign.Labeling algorithm refers to and touch threshold is compared with touch offset data TCD and thereby detect the coordinate of the touch offset data TCD that is equal to or greater than this touch threshold as the algorithm of candidate's coordinate TCC.Touch algorithm performance element 50 will comprise that the touch coordinate data HiDxy about the information of touch coordinate sends to host computer system 70.Touch algorithm performance element 50 is implemented as micro-control unit (MCU).Describe touch algorithm performance element 50 in detail referring to Fig. 2 and Fig. 3.
Fig. 2 illustrates in detail according to the block diagram of the touch algorithm performance element of embodiment.Fig. 3 illustrates according to the process flow diagram of the method for the standard of compensation data of embodiment.Fig. 4 illustrates according to the exemplary plot of the touch raw data of the method for the illustrative standard of compensation data of Fig. 3, benchmark offset data, reference data and touch offset data.In the figure of Fig. 4, each figure has described touch raw data, benchmark offset data, reference data and touch offset data, the position of X-axis indication Rx line (Rx passage), the position of Y-axis indication Tx line (Tx passage), and the data value of Z axis indication correspondence position.Therefore, the position of the position of Rx line (Rx passage) and Tx line (Tx passage) represents with coordinate (x, y).
With reference to Fig. 2, touch algorithm performance element 50 comprises touch raw data compensating unit 51, storer 52, touches candidate's coordinate measurement unit 53, benchmark offset data generation unit 54 and reference data generation unit 55.Touch algorithm performance element 50 can also comprise touch coordinate computing unit 56, and touch coordinate computing unit 56 sequentially uses integral compensation algorithm, labeling algorithm etc. to calculate touch coordinate to touching offset data TCD.Touch coordinate computing unit 56 will comprise that the touch coordinate data HiDxy about the information of touch coordinate sends to host computer system 70.Object for convenience of description, described separately benchmark offset data generation unit 54 and touch coordinate computing unit 56 in function, but benchmark offset data generation unit 54 can be included in touch coordinate computing unit 56.Describe below with reference to Fig. 2, Fig. 3 and Fig. 4 the method for being carried out the 50 standard of compensation data that use by touch algorithm in detail.
First, touch raw data TRD (n) in the n frame period is input to and touches raw data compensating unit 51 from Rx driving circuit 42, and is stored in (n-1) in the storer 52 reference data RD (n-1) in the frame period and is input to and touches raw data compensating unit 51.Utilize (n-1) reference data RD (n-1) in the frame period, touch raw data compensating unit 51 and compensate the touch raw data TRD (n) in the n frame period and calculate the touch offset data TCD (n) in the n frame period.Particularly, as shown in Figure 4, the touch raw data TRD (n) that touch raw data compensating unit 51 was carried out from the n frame period deducts the mathematical operation of (n-1) the reference data RD (n-1) in the frame period, and calculates the touch offset data TCD (n) in the n frame period.As shown in Figure 4, (n-1) reference data RD (n-1) in the frame period is calculated as the mean value of the benchmark offset data RCD (n-4) of (n-4) frame period to the (n-1) in the frame period to RCD (n-1).Touching raw data compensating unit 51 outputs to the touch offset data TCD (n) in the n frame period to touch candidate's coordinate measurement unit 53 and touch coordinate computing unit 56(S101).
Touch offset data TCD (n) in the second, the n frame period is input to touch candidate's coordinate measurement unit 53 from touching raw data compensating unit 51.Touch candidate's coordinate measurement unit 53 and analyze the touch offset data TCD (n) in the n frame period, detect thus and touch candidate's coordinate TCC.Particularly, touch candidate's coordinate measurement unit 53 the touch offset data TCD in the n frame period is sequentially used to integral compensation algorithm, labeling algorithm etc.Integral compensation algorithm refer to by have on the occasion of touch offset data TCD and have the touch offset data TCD of negative value unified for have on the occasion of the algorithm of touch offset data TCD, change negative sign into positive sign.Labeling algorithm refers to and touch threshold is compared with touch offset data TCD and thereby detect the coordinate of the touch offset data TCD that is equal to or greater than this touch threshold as the algorithm of candidate's coordinate TCC.
The 3rd, the touch raw data TRD (n) in the n frame period is input to benchmark offset data generation unit 54 from Rx driving circuit 42.As shown in Figure 5A, benchmark offset data generation unit 54 is set tag block on the touch raw data TRD corresponding with touching candidate's coordinate TCC.As shown in Figure 5 B, benchmark offset data generation unit 54 uncompensations are not included in the touch raw data in tag block LB, but compensation is included in the touch raw data in tag block LB, produces thus the benchmark offset data RCD in the n frame period.Therefore, as shown in Fig. 5 A and Fig. 5 B, touch raw data TRD and benchmark offset data RCD and there is identical value at the coordinate place that is not included in the touch raw data TRD in tag block LB, but touch raw data TRD and benchmark offset data RCD has different values at the coordinate place that is included in the touch raw data TRD in tag block LB.In the figure of Fig. 5 A and Fig. 5 B, each figure has described touch raw data, benchmark offset data, the position of X-axis indication Rx line (Rx passage), the position of Y-axis indication Tx line (Tx passage), and the data value of Z axis indication correspondence position.Therefore, the position of the position of Rx line (Rx passage) and Tx line (Tx passage) represents with coordinate (x, y).
In addition, touch if there is not user, do not detect and touch candidate's coordinate.Therefore, as shown in Figure 4, the benchmark offset data RCD (n-4) in (n-1) frame period in (n-4) frame period to the (do not occur that user touch) to RCD (n-1) according to the touch raw data TRD (n-4) in the frame period produces to the roughly the same mode of TRD (n-1) with (n-4) frame period to the (n-1).But, as shown in Figure 4, in tag block LB, the mode that the benchmark offset data RCD (n) in the n frame period has the value different from touching raw data TRD (n) according to the benchmark offset data RCD (n) that n is shaken the cycle in (user's touch has occurred) produces.Describe the method that benchmark offset data generation unit 54 compensates the touch raw data that tag block LB comprises below in detail.
Benchmark offset data generation unit 54 compensates according to the mode that makes each touch raw data have touch maximal value, minimum value or the maximal value of raw data and the mean value of minimum value the touch raw data that tag block LB comprises.Fig. 6 is the exemplary plot that illustrates tag block.For convenience, Fig. 6 is exemplified with the tag block of 4 × 4.For example, as shown in Figure 6, benchmark offset data generation unit 54 compensates according to the mode each data in ten six (16) individual touch raw data touch with the maximal value of raw data or the mean value of minimum value or maximal value and minimum value ten six (16) the individual touch raw data that tag block LB comprises.
In addition, benchmark offset data generation unit 54 compensates according to the mode that makes each touch raw data have the mean value that touches raw data the touch raw data being included in tag block LB.For example, as shown in Figure 6, benchmark offset data generation unit 54 can compensate ten six (16) the individual touch raw data that are included in tag block LB according to the mode that makes each data in ten six (16) individual touch raw data have the mean value that touches raw data.
In addition, benchmark offset data generation unit 54 according to make each touch original have in the mode of the intermediate value of the touch raw data at the coordinate place corresponding with the edge of tag block LB compensate the touch raw data being included in tag block LB.For example, as shown in Figure 6, benchmark offset data generation unit 54 can compensate ten six (16) the individual touch raw data that are included in tag block LB according to each data in ten six (16) individual touch raw data are had in the mode of the intermediate value of ten two (12) the individual touch raw data at the coordinate place corresponding with the edge of tag block LB.
In addition, to the p in tag block LB, capable (p is the natural number of condition that meets 1≤p≤r to benchmark offset data generation unit 54, and r is the quantity of the row in tag block LB) in touch raw data carry out interpolation, and produce p interpolative data, compensate p in the tag block LB touch raw data in capable according to the mode that makes each touch raw data there is p interpolative data thus.For example, as shown in Figure 6, the mean value of the touch raw data in the first row R1 that benchmark offset data generation unit 54 produces in tag block LB is as the first interpolative data, and the mean value that produces the touch raw data in the second row R2 is as the second interpolative data.Then, as shown in Figure 6, benchmark offset data generation unit 54 touches according to each in the first row R1 making in tag block LB the mode that raw data has the first interpolative data and compensates the touch raw data in the first row R1 in tag block LB, and compensates the touch raw data in the second row R2 according to making each in the second row R2 touch the mode that raw data has the second interpolative data.
In addition, benchmark offset data generation unit 54 carries out interpolation to the touch raw data in the p row in tag block LB, and produce p interpolative data, compensate the touch raw data in the p row in tag block LB according to the mode that makes each touch raw data there is p interpolative data thus.For example, as shown in Figure 6, benchmark offset data generation unit 54 produces the mean value of the touch raw data in the first row C1 in tag block LB as the first interpolative data, and the mean value that produces the touch raw data in secondary series C2 is as the second interpolative data.Then, as shown in Figure 6, benchmark offset data generation unit 54 touches according to each in the first row C1 making in tag block LB the mode that raw data has the first interpolative data and compensates the touch raw data in the first row C1 in tag block LB, and compensates the touch raw data in secondary series C2 according to making each in secondary series C2 touch the mode that raw data has the second interpolative data.
In addition, touch raw data and coordinate (1 that benchmark offset data generation unit 54 is located to coordinate (p, p) the coordinate in tag block LB (p, 1), p) the touch raw data of locating to coordinate (p, p) is carried out interpolation and produces interpolative data.Then, benchmark offset data generation unit 54 compensates the coordinate (p in tag block LB according to the mode that makes each touch raw data have interpolative data, 1) to coordinate (p, p) the touch raw data of locating and coordinate (1, p) the touch raw data of locating to coordinate (p, p).For example, benchmark offset data generation unit 54 is created in the coordinate (2 in tag block LB, 1), (2,2) and (1,2) mean value of the touch raw data of locating is as interpolative data, and compensates coordinate (2,1), (2 according to the mode that makes each touch raw data have interpolative data, 2) and (1,2) touch raw data of locating.The touch raw data that coordinate (2,1) is located represents to be positioned at the second row R2 in tag block LB and the touch data (S103) at first row C1 place.
The 4th, benchmark offset data RCD (n) in the n frame period (n is natural number) is input to reference data generation unit 55 from benchmark offset data generation unit 54, and the benchmark offset data RCD (n-k) of (n-k) (k is the natural number that meets n>k condition) to (n-1) in the frame period is input to reference data generation unit 55 to RCD (n-1) from storer 52.Reference data generation unit 55 calculates benchmark offset data RCD (n) in the n frame period and (n-k) benchmark offset data RCD (n-k) to (n-1) in frame period mean value to RCD (n-1), and thereby produces the reference data RD (n) in the n frame period.For example, as shown in Figure 4, the reference data RD (n) in the n frame period is calculated as the mean value (S104) of (n-3) benchmark offset data RCD (n-3) in the frame period to n frame period to RCD (n).
The 5th, reference data generation unit 55 is stored in the reference data RD in the n frame period (n) and the benchmark offset data RCD (n) in the n frame period in storer 52.Result, as shown in Figure 4, in the time of the touch raw data TRD (n+1) of compensation (n+1) in the frame period, in order to calculate (n+1) touch offset data TCD (n+1) in the frame period, touch the reference data RD (n) that raw data compensating unit 51 can use in the n frame period.That is to say, according to embodiment, even if user touches generation, also can upgrade reference data RD (n) (S105).
Whether as mentioned above, according to embodiment, occur no matter user touches, reference data is updated.As a result, according to embodiment, even if noise, at short time flip-flop, also can reflect this noise in reference data.This makes can correctly compensate touch raw data in the time utilizing reference data compensation to touch raw data.
Fig. 7 A and Fig. 7 B illustrate respectively the touch offset data that the method that uses the compensation of correlation technique to touch raw data calculates and use the exemplary plot that touches the touch offset data that the method for raw data calculates according to the compensation of embodiment of the present invention.In the figure of Fig. 7 A and Fig. 7 B, each figure has described touch raw data, the position of X-axis indication Rx line (Rx passage), the position of Y-axis indication Tx line (Tx passage), and the data value of Z axis indication correspondence position.
Easily see from Fig. 7 A and Fig. 7 B, touch the touch offset data TCDt at touch coordinate place in the touch offset data in n frame period of method calculating that the touch offset data TCDt at touch coordinate place in the touch offset data in the n frame period that the method for raw data calculates and the poor D2 between the maximum of T CDnm of the touch offset data at non-touch coordinate place be greater than the compensation touch raw data of correlation technique and the poor D1 between the maximum of T CDnm of the touch offset data at non-coordinate place according to compensation according to the present invention.The noise that between the maximum of T CDnm of the touch offset data at the touch offset data TCDt at touch coordinate place and non-touch coordinate place, poor little fact table is shown in the touch raw data at non-touch coordinate place is not removed so muchly.If noise storage reaches touch threshold, cause the mistake in the calculating of touch coordinate.In a word, the method that touches raw data according to the method for the compensation touch raw data of embodiment than the compensation of correlation technique is more effectively removed the noise touching in raw data.
Although described embodiment with reference to multiple illustrative embodiments, it should be understood that those skilled in the art can find out many other modification and the embodiment in the scope that falls into principle of the present disclosure.More particularly, can be in the scope of the disclosure, accompanying drawing and claims the building block to this subject combination device and/device carries out various conversion and modification.Except the conversion to building block and/or device and revising, substituting use is also obvious to those skilled in the art.
The cross reference of related application
The application requires the right of priority of the korean patent application No.10-2012-0151149 submitting in Koran Office on Dec 21st, 2012, by reference it is openly incorporated into this for all objects.

Claims (20)

1. a method for standard of compensation data, the method comprises the following steps:
(n-1) reference data in the frame period being stored in storer by use compensates the touch raw data in the n frame period, calculates the touch offset data in the n frame period;
Detect touch candidate coordinate by the described touch offset data of analyzing in the n frame period;
By the described touch raw data corresponding with described touch candidate coordinate being arranged to tag block and being included in the described touch raw data in described tag block and uncompensation is not included in the described touch raw data in described tag block, the benchmark offset data in the generation n frame period by compensation; And
By calculating described benchmark offset data in the n frame period and being stored in the mean value of (n-k) frame period to the (n-1) in described storer benchmark offset data in the frame period, produce the reference data in the n frame period.
2. method according to claim 1, the method is further comprising the steps of: described benchmark offset data and the described reference data in the n frame period in the storage n frame period.
3. method according to claim 1, wherein, the described step of calculating touch offset data deducts (n-1) described reference data in the frame period by the described touch raw data from the n frame period and calculates the described touch offset data in the n frame period.
4. method according to claim 1, wherein, the coordinate that the described step of detection touch candidate coordinate detects the described touch offset data that is equal to or greater than touch threshold in the n frame period is as described touch candidate coordinate.
5. method according to claim 1, wherein, the described step that produces benchmark offset data compensates according to the mode that makes each in described touch raw data have the maximal value of described touch raw data or the mean value of minimum value or described maximal value and minimum value the described touch raw data being included in described tag block.
6. method according to claim 1, wherein, the described step that produces benchmark offset data compensates according to the mode that makes each in described touch raw data have the mean value of described touch raw data the described touch raw data being included in described tag block.
7. method according to claim 1, wherein, the described step that produces benchmark offset data compensates according to the mode that makes each in described touch raw data have the intermediate value of the described touch raw data at the coordinate place corresponding with the edge of described tag block the described touch raw data being included in described tag block.
8. method according to claim 1, wherein, produce the described step of the benchmark offset data described touch raw data in capable to the p in described tag block and carry out interpolation, produce p interpolative data, and then compensate p in the described tag block described touch raw data in capable according to the mode that makes each in described touch raw data there is p interpolative data.
9. method according to claim 1, wherein, the described step that produces benchmark offset data is carried out interpolation to the described touch raw data in the p row in described tag block, produce p interpolative data, and then compensate p in the described tag block described touch raw data in being listed as according to the mode that makes each in described touch raw data there is p interpolative data.
10. method according to claim 1, wherein, produce the described step of benchmark offset data to the coordinate (p in described tag block, 1) to coordinate (p, p) described touch raw data and the coordinate (1 located, p) to coordinate (p, p) the described touch raw data of locating is carried out interpolation, produce interpolative data, and then according to make each in described touch raw data have described interpolative data mode compensate the coordinate (p in described tag block, 1) to coordinate (p, p) described touch raw data and the coordinate (1 located, p) to coordinate (p, p) the described touch raw data of locating.
11. 1 kinds of touch panel devices, this touch panel device comprises:
Touch screen, this touch screen comprises Tx line, Rx line and is formed on the touch sensor on the cross section that described Tx line and described Rx line intersect;
Touch driving circuit, this touch driving circuit provides driving pulse to described Tx line, is numerical data by the voltage transitions receiving by described Rx line, and thereby output touch raw data; And
Touch algorithm performance element, described touch raw data is input to described touch algorithm performance element from described touch driving circuit,
Wherein, described touch algorithm performance element comprises:
Touch raw data compensating unit, (n-1) reference data in the frame period that this touch raw data compensating unit is stored in storer by use compensates the described touch raw data in the n frame period, calculates the touch offset data in the n frame period;
Touch candidate's coordinate measurement unit, the described touch offset data in this touch candidate coordinate measurement element analysis n frame period, and thereby detect and touch candidate coordinate;
Benchmark offset data generation unit, this benchmark offset data generation unit is by arranging tag block and being included in the described touch raw data in described tag block and uncompensation is not included in the described touch raw data in described tag block, the benchmark offset data in the generation n frame period by compensation to the described touch raw data corresponding with described touch candidate coordinate; And
Reference data generation unit, this reference data generation unit is by calculating the described benchmark offset data in the n frame period and being stored in (k) mean value of the described benchmark offset data of frame period to the (n-1) in the frame period of n –, the reference data in the generation n frame period in described storer.
12. equipment according to claim 11, wherein, described reference data generation unit is stored in described benchmark offset data and the described reference data in the n frame period in the n frame period in described storer.
13. equipment according to claim 11, wherein, described touch raw data compensating unit deducts (n-1) described reference data in the frame period by the described touch raw data from the n frame period and calculates the described touch offset data in the n frame period.
14. equipment according to claim 11, wherein, the coordinate of the described touch offset data that is equal to or greater than touch threshold in described touch candidate's coordinate measurement unit inspection n frame period is as described touch candidate coordinate.
15. equipment according to claim 11, wherein, described benchmark offset data generation unit compensates according to the mode that makes each in described touch raw data have the maximal value of described touch raw data or the mean value of minimum value or described maximal value and minimum value the described touch raw data that described tag block comprises.
16. equipment according to claim 11, wherein, described benchmark offset data generation unit compensates according to the mode that makes each in described touch raw data have the mean value of described touch raw data the described touch raw data being included in described tag block.
17. equipment according to claim 11, wherein, described benchmark offset data generation unit compensates according to the mode that makes each in described touch raw data have the intermediate value of the described touch raw data at the coordinate place corresponding with the edge of described tag block the described touch raw data being included in described tag block.
18. equipment according to claim 11, wherein, described touch raw data during described benchmark offset data generation unit is capable to the p in described tag block is carried out interpolation, produce p interpolative data, and then compensate p in the described tag block described touch raw data in capable according to the mode that makes each in described touch raw data there is p interpolative data.
19. equipment according to claim 11, wherein, described benchmark offset data generation unit carries out interpolation to the described touch raw data in the p row in described tag block, produce p interpolative data, and then compensate p in the described tag block described touch raw data in being listed as according to the mode that makes each in described touch raw data there is p interpolative data.
20. equipment according to claim 11, wherein, benchmark offset data generation unit is to the coordinate (p in described tag block, 1) to coordinate (p, p) described touch raw data and the coordinate (1 located, p) to coordinate (p, p) the described touch raw data of locating is carried out interpolation, produce interpolative data, and then compensate the coordinate (p in described tag block according to the mode that makes each in described touch raw data there is described interpolative data, 1) to coordinate (p, p) described touch raw data and the coordinate (1 located, p) to coordinate (p, p) the described touch raw data of locating.
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